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It was one of 23 sterilizers in the United States that the EPA said posed a risk for people nearby.

In Laredo, Texas, where the most toxic industrial sterilizer in the nation is located, residents were not informed of their exposure until 2021.

Medical sterilizers would also need to continuously monitor air pollution to make sure controls function properly.

The EPA is also developing proposals for other sources of ethylene oxide, including polyether polyols production, hospital sterilizers, and smaller chemical manufacturers known as “area sources.”

According to industry, the medical sterilizer system in the state has little room for disruption.